ORDER PYGOPODES. 23 



RANGE. Western North America. Breeds from central British Columbia, 

 Great Slave Lake, and Manitoba south to southern California, northern 

 Arizona, northern Nebraska, and northern Iowa; winters from central Cali- 

 fornia to Cape San Lucas and Guatemala; east to Kansas in migration; 

 casual in Missouri, Indiana, and Ontario. 



SUBGENUS TACHYBAPTUS REICHENBACH. 



Tachybaptus REICHENBACH, Avium Syst. Nat., 1849, pi. ii. Type, 

 by orig. desig., Colymbus minor REICHENBACH = C. ruficollis PALLAS. 



Colymbus dominicus LINNAEUS. 



RANGE. Subtropical and tropical America. 



a. [Colymbus dominicus dominicus. Extralimital.] 



6. Colymbus dominicus brachypterus CHAPMAN. Mexican Grebe. [5.] 



Colymbus dominicus brachypterus CHAPMAN, Bull. Amer. Mus. N. H., XII, 

 1899, 256. (Lomita Ranch, Lower Rio Grande, Texas.) 



RANGE. Southern Lower California and southern Texas south to Panama. 



GENUS PODILYMBUS LESSON. 



Podilymbus LESSON, Traite" d'Orn., 1831, 595. Type, by monotypy, 

 Podiceps carolinensis LATHAM = Colymbus podiceps LINN^JUS. 



Podilymbus podiceps (LiNN^us). Pied-billed Grebe. [6.] 



Colymbus podiceps LINNAEUS, Syst. Nat., ed. 10, 1, 1758, 136. (Carolina.) 



RANGE. North and South America. Breeds from British Colum- 

 bia, southern Mackenzie, southern Keewatin, Quebec, and New 

 Brunswick south to Chile and Argentina, but often rare or local; 

 winters from Washington, Texas, Mississippi, and Potomac Valley 

 southward. 



